A .22 Long Rifle firearm designed with a permanently attached silencing component built into the barrel offers inherent noise reduction. This design typically involves a series of expansion chambers surrounding the bore, which slow and cool the escaping gases, mitigating the report of the shot. A common example utilizes a ported barrel shrouded within a larger tube. This configuration differs significantly from firearms that utilize detachable suppressors.
The primary advantage of this type of firearm lies in its enhanced sound suppression, often making the shot significantly quieter than other methods of noise reduction. This characteristic can be valuable in various applications where minimizing noise pollution is critical, such as pest control or training exercises. The permanent attachment of the silencing component often simplifies the legal processes associated with firearm ownership, as it bypasses the sometimes complex regulations surrounding detachable suppressors. Historically, these designs have been favored for their discreet nature.